What is the generation time calculated for E. coli in this experiment based on the absorbance data provided? Why is this different than the optimal generation time of 20 minutes reported in the liter
a) 20 minutes; due to variations in experimental conditions
b) 30 minutes; due to the presence of inhibitors in the growth medium
c) 15 minutes; due to a higher temperature in the experiment
d) 25 minutes; due to the absence of essential nutrients